Protolith and Metamorphic Age of the Sieggraben Eclogites: Implications for the Permian to Cretaceous Wilson Cycle in the Austroalpine Unit

2021 ◽  
Author(s):  
Ruihong Chang ◽  
Franz Neubauer ◽  
Yongjiang Liu ◽  
Johann Genser ◽  
Sihua Yuan ◽  
...  
Keyword(s):  
Wilson Cycle ◽  
Austroalpine Unit

scholarly journals Appalachian-style multi-terrane Wilson cycle model for the assembly of South China: COMMENT

Geology ◽  
2018 ◽  
Vol 46 (6) ◽  
pp. e446-e446 ◽  
Author(s):  
Michel Faure ◽  
Jacques Charvet ◽  
Yan Chen
Keyword(s):  
South China ◽  
Cycle Model ◽  
Wilson Cycle

scholarly journals REINTERPRETAÇÃO DA AMBIÊNCIA TECTÔNICA DE FORMAÇÃO DO LEUCOGRANITO DE GOUVEIA (MINAS GERAIS)

2018 ◽  
Author(s):  
Alexandre de Oliveira Chaves ◽  
Raphael Martins Coelho
Keyword(s):  
Heat Transfer ◽  
Tectonic Setting ◽  
Minas Gerais ◽  
Mantle Plumes ◽  
Crustal Melting ◽  
Type Granite ◽  
Wilson Cycle ◽  
Tectonic Settings

Resumo: Granitoides podem se formar não apenas nos vários ambientes dos diferentes estágios do ciclo de Wilson, como também acima de plumas mantélicas, como resultado da fusão crustal decorrente do calor fornecido pelas plumas. Com base na geoquímica e geocronologia disponível na literatura, este artigo leva em conta essa última possibilidade na reinterpretação do ambiente tectônico de formação do leucogranito de Gouveia (Minas Gerais), que havia sido previamente interpretado como granitoide de ambiente tectônico colisional.Palavras Chave: Granito tipo-A, Gouveia, fusão crustalAbstract:TECTONIC SETTING OF THE GOUVEIA LEUCOGRANITE (MINAS GERAIS) REINTERPRETED. Granitoids can be originated not only in the diverse tectonic settings of the Wilson Cycle, but also above mantle plumes, as a result of the crustal melting promoted by heat transfer from plumes. Based on geochemistry and geochronology available in literature, this paper takes this possibility into account on the reinterpretation of the Gouveia leucogranite tectonic setting, previously interpreted as collisional.Keywords: A-type granite, Gouveia, crustal melting

The Chitradurga greenstone succession in south India and evolution of the late Archaean basin

1988 ◽  
Vol 125 (5) ◽  
pp. 507-519 ◽  
Author(s):  
P. K. Bhattacharyya ◽  
H. N. Bhattacharya ◽  
A. D. Mukherjee
Keyword(s):  
South India ◽  
Subsequent Development ◽  
Low Grade ◽  
Late Archaean ◽  
Clastic Sediments ◽  
Granitic Intrusion ◽  
Near Shore ◽  
Extensional Faulting ◽  
Wilson Cycle ◽  
Similar Deformation

AbstractThe Chitradurga greenstone succession of south India comprises a thick pile (~ 10 km) of late Archaean volcanic flows and terrigenous clastic sediments, metamorphosed from greenschist to low-grade amphilobite facies. An older near-shore sedimentary sequence of cratonic affiliation and an off-shore bimodal volcanic sequence were deposited contemporaneously on a gneissic basement. The volcanics are metasomatically altered, and major, minor and trace element data fail to discriminate the metavolcanics in terms of modern plate settings. A younger turbidite sequence of coarser elastics covered the older deposits without any apparent tectonic or erosional break. All the rocks of the succession display evidence of similar deformation, prior to invasion by younger granites (~ 2.5 Ga)in a late syn-kinematic phase.This suggests that initially a simple flat-lying downwarp in a continental crust served as the passive receptacle of the platform-type sediments, and also witnessed volcanism along extensional faulting. This phase of the basin was not associated with any compressive deformation. Subsidence of the Chitradurga basin by the denser volcanics and uplift in the gneissic borderlands provided the infrastructure for subsequent development of the younger turbidite sequence covering the still virtually undeformed older deposits. A compressive orogeny, accompanied by granitic intrusion (~ 2.5Ga) in a late kinematic phase, ultimately deformed and uplifted the basin-fill during the declining phase of basinal activity.There is no evidence in the belt to suggest that the plate-tectonic (Wilson cycle) processes, pending a terminal orogeny, were operative during evaluation of the Chitradurga basin.

The classic Wilson cycle revisited

2018 ◽  
Vol 470 (1) ◽  
pp. 19-38 ◽  
Author(s):  
Ian W. D. Dalziel ◽  
John F. Dewey
Keyword(s):  
North Atlantic ◽  
North Atlantic Ocean ◽  
Ocean Basin ◽  
Early Paleozoic ◽  
The North ◽  
History Of ◽  
Wilson Cycle ◽  
Mountain Chain ◽  
The 1960S ◽  
Opening And Closing

AbstractIn the first application of the developing plate tectonic theory to the pre-Pangaea world 50 years ago, attempting to explain the origin of the Paleozoic Appalachian–Caledonian orogen, J. Tuzo Wilson asked the question: ‘Did the Atlantic close and then reopen?’. This question formed the basis of the concept of the Wilson cycle: ocean basins opening and closing to form a collisional mountain chain. The accordion-like motion of the continents bordering the Atlantic envisioned by Wilson in the 1960s, with proto-Appalachian Laurentia separating from Europe and Africa during the early Paleozoic in almost exactly the same position that it subsequently returned during the late Paleozoic amalgamation of Pangaea, now seems an unlikely scenario. We integrate the Paleozoic history of the continents bordering the present day basin of the North Atlantic Ocean with that of the southern continents to develop a radically revised picture of the classic Wilson cycle The concept of ocean basins opening and closing is retained, but the process we envisage also involves thousands of kilometres of mainly dextral motion parallel with the margins of the opposing Laurentia and Gondwanaland continents, as well as complex and prolonged tectonic interaction across an often narrow ocean basin, rather than the single collision suggested by Wilson.

scholarly journals Widespread Permian granite magmatism in Lower Austroalpine units: significance for Permian rifting in the Eastern Alps

2020 ◽  
Vol 113 (1) ◽  
Author(s):  
Sihua Yuan ◽  
Franz Neubauer ◽  
Yongjiang Liu ◽  
Johann Genser ◽  
Boran Liu ◽  
...  
Keyword(s):  
Tectonic Setting ◽  
Eastern Alps ◽  
Geochemical Data ◽  
Calc Alkaline ◽  
Three Samples ◽  
High K ◽  
Icp Ms ◽  
Granite Magmatism ◽  
Austroalpine Unit ◽  
Granite Suite

Abstract The Grobgneis complex, located in the eastern Austroalpine unit of the Eastern Alps, exposes large volumes of pre-Alpine porphyric metagranites, sometimes associated with small gabbroic bodies. To better understand tectonic setting of the metagranites, we carried out detailed geochronological and geochemical investigations on the major part of the porphyric metagranites. LA–ICP–MS zircon U–Pb dating of three metagranites sampled from the Grobgneis complex provides the first reliable evidence for large volumes of Permian plutonism within the pre-Alpine basement of the Lower Austroalpine units. Concordant zircons from three samples yield ages at 272.2 ± 1.2 Ma, 268.6 ± 2.3 Ma and 267.6 ± 2.9 Ma interpreted to date the emplacement of the granite suite. In combination with published ages for other Permian Alpine magmatic bodies, the new U–Pb ages provide evidence of a temporally restricted period of plutonism (“Grobgneis”) in the Raabalpen basement Complex during the Middle Permian. Comparing the investigated basement with that of the West Carpathian basement, we argue that widespread Permian granite magmatism occurred in the Lower Austroalpine units. They belong to the high-K calc-alkaline to shoshonitic S-type series on the base of geochemical data. Zircon Hf isotopic compositions of the Grobgneis metagranites show εHf(t) values of − 4.37 to − 0.6, with TDM2 model ages of 1.31–1.55 Ga, indicating that their protoliths were derived by the recycling of older continental crust. We suggest that the Permian granitic and gabbroic rocks are considered as rifted-related rocks in the Lower Austroalpine units and are contemporaneous with cover sediments.

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